13123420420 has 96 divisors (see below), whose sum is σ = 30410980992. Its totient is φ = 4756752000.

The previous prime is 13123420411. The next prime is 13123420439. The reversal of 13123420420 is 2402432131.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 13123420391 and 13123420400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11206435 + ... + 11207605.

It is an arithmetic number, because the mean of its divisors is an integer number (316781052).

Almost surely, 2^13123420420 is an apocalyptic number.

13123420420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13123420420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15205490496).

13123420420 is an abundant number, since it is smaller than the sum of its proper divisors (17287560572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13123420420 is a wasteful number, since it uses less digits than its factorization.

13123420420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 13123420420 its reverse (2402432131), we get a palindrome (15525852551).

The spelling of 13123420420 in words is "thirteen billion, one hundred twenty-three million, four hundred twenty thousand, four hundred twenty".